Question

What is the area of a circle that has a radius of 30 cm?

Answer 1

C=2*pi*r --> Write the problem.
30=2*pi*r --> Substitute 30 for C.
15=pi*r --> Divide 2 on both sides of the equation.
15/pi=r --> Divide pi on both sides of the equation.
r=15/pi --> Switch the terms around.
r=4.8 Approximate the answer.

So the answer is about 4.8 cm.

Answer 2

Gahhhh D:
None of those answers match :/